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Physics MCQs

439 Questions
Subject Preparation Guide

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Practice core concepts of measurement, motion, force, energy, waves, electricity, magnetism and modern physics.

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What is the centripetal force?

  • A Force pushing an object outward in circular motion
  • B Force causing linear acceleration
  • C Force equal to mass times velocity
  • D Force directed toward the centre of circular motion
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What is the phenomenon called when light changes speed and direction while passing from one medium to another?

  • A Reflection
  • B Interference
  • C Refraction
  • D Polarization
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What is the term for the smallest particle of an element that retains its chemical properties?

  • A Molecule
  • B Ion
  • C Atom
  • D Electron
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The working principle of an optical fiber is based on:

  • A Polarization
  • B Refraction
  • C Diffraction
  • D Total internal reflection
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What is the SI unit of inductance?

  • A Farad
  • B Tesla
  • C Weber
  • D Henry
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What is the term for energy possessed by an object due to its motion?

  • A Potential energy
  • B Thermal energy
  • C Nuclear energy
  • D Kinetic energy
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Absolute zero on the Kelvin scale corresponds to:

  • A 0 degrees Celsius
  • B -273.15 degrees Celsius
  • C 100 degrees Celsius
  • D -100 degrees Celsius
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A magnetic field is produced around a conductor when it carries:

  • A Static charge only
  • B Voltage only
  • C Resistance
  • D Electric current
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A body moving in a circle at constant speed has:

  • A Centripetal acceleration directed toward the center
  • B Constant velocity
  • C Zero acceleration
  • D Acceleration directed away from the center
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What is the speed of light in a vacuum?

  • A 3 x 10 to the power 6 m/s
  • B 3 x 10 to the power 10 m/s
  • C 3 x 10 to the power 4 m/s
  • D 3 x 10 to the power 8 m/s
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Which particle has no electric charge?

  • A Neutron
  • B Proton
  • C Electron
  • D Positron
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What is the term for an object's tendency to maintain constant velocity unless acted upon?

  • A Momentum
  • B Torque
  • C Impulse
  • D Inertia
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The phenomenon of bending of light around obstacles is called:

  • A Refraction
  • B Diffraction
  • C Reflection
  • D Dispersion
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Which particle has no electric charge and is found in the nucleus?

  • A Proton
  • B Electron
  • C Neutron
  • D Positron
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What type of lens is thicker at the centre than at the edges?

  • A Concave lens
  • B Plano-concave lens
  • C Biconcave lens
  • D Convex lens
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A collision in which kinetic energy is not conserved is called:

  • A Inelastic collision
  • B Elastic collision
  • C Momentum collision
  • D Perfectly elastic collision
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What is the term for the point where all the weight of an object appears to act?

  • A Centroid
  • B Center of mass
  • C Center of gravity
  • D Focal point
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Which law states that the volume of a gas is directly proportional to its temperature at constant pressure?

  • A Charles's Law
  • B Boyle's Law
  • C Gay-Lussac's Law
  • D Avogadro's Law
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The SI unit of electric current is:

  • A Volt
  • B Ohm
  • C Ampere
  • D Coulomb
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What is the half-life of a radioactive substance?

  • A Time for the substance to completely decay
  • B Time for the radiation to halve in intensity only
  • C Time for half the nuclei to decay
  • D Time for temperature to reduce by half